Ponderomotive streaking of the ionization potential as a method for measuring pulse durations in the XUV domain with fs resolution

Toma, E. S.; Müller, H. G.; Paul, P.; Breger, P.; Chéret, M.; Agostini, Pierre; Blanc, C. Le; Mullot, G.; Chériaux, G.

doi:10.1103/physreva.62.061801

Cited by 82 publications

(28 citation statements)

References 23 publications

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“…In this second and current generation of the set up we perform HHG in a cell, focus the VUV radiation into the interaction region and use a magnetic bottle type time of flight electron spectrometer for PES. Side bands in the photoelectron spectra are used to determine the time resolution of the set up (68)(69)(70)(71)(72)(73)(74)(75)(76)(77)(78)(79).…”

Section: Introductionmentioning

confidence: 99%

Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation

Wernet

Gaudin

Godehusen

et al. 2011

Review of Scientific Instruments

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A laser-based tabletop approach to femtosecond time-resolved photoelectron spectroscopy with photons in the vacuum-ultraviolet (VUV) energy range is described. The femtosecond VUV pulses are produced by high-order harmonic generation (HHG) of an amplified femtosecond Ti:sapphire laser system. Two generations of the same set up and results from photoelectron spectroscopy in the gas phase are discussed. In both generations a toroidal grating monochromator was used to select one harmonic in the photon energy range of 20-30 eV. The first generation of the set up was used to perform photoelectron spectroscopy in the gas phase to determine the bandwidth of the source. We find that our HHG source has a bandwidth of 140±40 meV. The second and current generation is optimized for femtosecond pump-probe photoelectron spectroscopy with high flux and a small spot size at the sample of the femtosecond probe pulses. The VUV radiation is focused into the interaction region with a toroidal mirror to a spot smaller than 100 x 100 μm 2 and the flux amounts to 10 10 photons/s at the sample at a repetition rate of 1 kHz. The duration of the monochromatized VUV pulses is determined to be 120 femtoseconds resulting in an overall pump-probe time resolution of 135±5 fs. We show how this set up can be used to map the transient valence electronic structure in molecular dissociation.3

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Section: Introductionmentioning

confidence: 99%

Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation

Wernet

Gaudin

Godehusen

et al. 2011

Review of Scientific Instruments

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“…In the resulting photoelectron spectrum a series of lines, so-called sidebands, are observed on both sides of the normal photoline 27,28 . Since the sidebands are very sensitive to the spatial and temporal overlap and to the physical characteristics of both the XUV and NIR pulses, this type of experiment is widely used for studying multi-photon ionization dynamics 29 as well as for characterizing linearly polarized ionizing FEL pulses 30 . In the present study it is applied to the characterization of the polarization properties of the FEL beam.…”

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confidence: 99%

Determining the polarization state of an extreme ultraviolet free-electron laser beam using atomic circular dichroism

et al. 2014

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Ultrafast extreme ultraviolet and X-ray free-electron lasers are set to revolutionize many domains such as bio-photonics and materials science, in a manner similar to optical lasers over the past two decades. Although their number will grow steadily over the coming decade, their complete characterization remains an elusive goal. This represents a significant barrier to their wider adoption and hence to the full realization of their potential in modern photon sciences. Although a great deal of progress has been made on temporal characterization and wavefront measurements at ultrahigh extreme ultraviolet and X-ray intensities, only few, if any progress on accurately measuring other key parameters such as the state of polarization has emerged. Here we show that by combining ultra-short extreme ultraviolet free electron laser pulses from FERMI with near-infrared laser pulses, we can accurately measure the polarization state of a free electron laser beam in an elegant, non-invasive and straightforward manner using circular dichroism.

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“…La courte durée des harmoniques a été caractérisée par différentes méthodes indiquant une durée de quelques femtosecondes selon la durée de l'impulsion laser de pompe [1][2][3]. Cette propriété est primordiale pour des applications de type pompe sonde comme par exemple en spectroscopie moléculaire et atomique [4] ou encore en physique du solide [5].…”

Section: Introductionunclassified

Contrôle de la phase relative d'impulsions harmoniques à une échelle de temps attoseconde

et al. 2003

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RESULTATS EXPERIMENTAUXCes expériences ont été réalisées sur le serveur laser LUCA du DRECAM à Saclay. Ce système délivre des impulsions infra rouge (IR) à 800nm, d'énergie allant jusqu'à lOOmJ, de durée 50fs à un taux de répétition de 20Hz. Les quatre impulsions harmoniques bloquées en phase sont générées en produisant quatre impulsions laser séparées en temps, focalisées dans un jet de gaz comme illustré en Figure 1

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Ponderomotive streaking of the ionization potential as a method for measuring pulse durations in the XUV domain with fs resolution

Cited by 82 publications

References 23 publications

Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation

Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation

Determining the polarization state of an extreme ultraviolet free-electron laser beam using atomic circular dichroism

Contrôle de la phase relative d'impulsions harmoniques à une échelle de temps attoseconde

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